mirror of https://github.com/sharkdp/fd.git
179 lines
4.9 KiB
Rust
179 lines
4.9 KiB
Rust
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// Copyright (c) 2017 fd developers
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// Licensed under the Apache License, Version 2.0
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// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0>
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// or the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
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// at your option. All files in the project carrying such
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// notice may not be copied, modified, or distributed except
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// according to those terms.
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use regex_syntax::hir::Hir;
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use regex_syntax::Parser;
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use std::ffi::OsString;
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pub use self::file_types::FileTypes;
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mod file_types;
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pub mod filter;
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pub mod opts;
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macro_rules! print_error {
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($($arg:tt)*) => (eprintln!($($arg)*))
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}
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macro_rules! print_error_and_exit {
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($($arg:tt)*) => {
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print_error!($($arg)*);
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::std::process::exit(1);
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};
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}
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/// Determine if a regex pattern contains a literal uppercase character.
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pub fn pattern_has_uppercase_char(pattern: &str) -> bool {
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Parser::new()
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.parse(pattern)
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.map(|hir| hir_has_uppercase_char(&hir))
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.unwrap_or(false)
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}
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/// Determine if a regex expression contains a literal uppercase character.
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fn hir_has_uppercase_char(hir: &Hir) -> bool {
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use regex_syntax::hir::*;
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match *hir.kind() {
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HirKind::Literal(Literal::Unicode(c)) => c.is_uppercase(),
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HirKind::Class(Class::Unicode(ref ranges)) => ranges
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.iter()
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.any(|r| r.start().is_uppercase() || r.end().is_uppercase()),
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HirKind::Group(Group { ref hir, .. }) | HirKind::Repetition(Repetition { ref hir, .. }) => {
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hir_has_uppercase_char(hir)
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}
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HirKind::Concat(ref hirs) | HirKind::Alternation(ref hirs) => {
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hirs.iter().any(hir_has_uppercase_char)
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}
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_ => false,
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}
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}
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/// Maximum size of the output buffer before flushing results to the console
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pub const MAX_BUFFER_LENGTH: usize = 1000;
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/// Traverse args_os, looking for -exec and replacing it with --exec.
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///
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/// # Returns
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///
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/// * The args, with substitution if required
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pub fn transform_args_with_exec<I>(original: I) -> Vec<OsString>
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where
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I: Iterator<Item = OsString>,
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{
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let mut in_exec_opt = false;
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let target = OsString::from("-exec");
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let long_start = OsString::from("--exec");
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let short_start = OsString::from("-x");
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let exec_end = OsString::from(";");
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original.fold(vec![], |mut args, curr| {
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if in_exec_opt {
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if curr == exec_end {
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in_exec_opt = false;
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}
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args.push(curr);
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return args;
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}
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if curr == target || curr == long_start || curr == short_start {
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args.push(if curr == target {
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OsString::from("--exec")
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} else {
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curr
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});
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in_exec_opt = true;
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} else {
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args.push(curr);
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}
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args
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})
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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fn oss(v: &str) -> OsString {
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OsString::from(v)
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}
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/// Ensure that -exec gets transformed into --exec
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#[test]
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fn normal_exec_substitution() {
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let original = vec![oss("fd"), oss("foo"), oss("-exec"), oss("cmd")];
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let expected = vec![oss("fd"), oss("foo"), oss("--exec"), oss("cmd")];
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let actual = transform_args_with_exec(original.into_iter());
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assert_eq!(expected, actual);
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}
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/// Ensure that --exec is not touched
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#[test]
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fn passthru_of_original_exec() {
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let original = vec![oss("fd"), oss("foo"), oss("--exec"), oss("cmd")];
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let expected = vec![oss("fd"), oss("foo"), oss("--exec"), oss("cmd")];
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let actual = transform_args_with_exec(original.into_iter());
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assert_eq!(expected, actual);
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}
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#[test]
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fn temp_check_that_exec_context_observed() {
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let original = vec![
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oss("fd"),
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oss("foo"),
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oss("-exec"),
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oss("cmd"),
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oss("-exec"),
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oss("ls"),
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oss(";"),
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oss("-exec"),
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oss("rm"),
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oss(";"),
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oss("--exec"),
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oss("find"),
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oss("-exec"),
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oss("rm"),
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oss(";"),
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oss("-x"),
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oss("foo"),
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oss("-exec"),
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oss("something"),
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oss(";"),
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oss("-exec"),
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];
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let expected = vec![
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oss("fd"),
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oss("foo"),
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oss("--exec"),
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oss("cmd"),
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oss("-exec"),
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oss("ls"),
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oss(";"),
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oss("--exec"),
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oss("rm"),
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oss(";"),
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oss("--exec"),
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oss("find"),
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oss("-exec"),
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oss("rm"),
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oss(";"),
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oss("-x"),
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oss("foo"),
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oss("-exec"),
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oss("something"),
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oss(";"),
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oss("--exec"),
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];
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let actual = transform_args_with_exec(original.into_iter());
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assert_eq!(expected, actual);
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}
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}
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